As the Observer notes, the move will reunite Berry with a good chunk of Huffpo’s senior team — co-founders Ken Lerer and Jonah Peretti, former CEO Eric Hippeau and former ad chief Greg Coleman. Most of that group left Huffpo as soon as the AOL deal closed.

Peretti, who now runs Buzzfeed, a son-of-Huffpo aggregator/news site with a flair for social media, credited Berry with much of Huffpo’s success, via a Twitter blessing:

When Paul Berry joined HuffPost had 3M UVs, today the site has 120M million & he deserves LOTS of credit for that growth